English has two verbs, "to do" and "to make," that are both equivalent to a single verb in some languages, which makes it difficult for speakers of those languages to know which one to use in any given situation. Understanding the difference in meaning is key to knowing which verb you need.
The Latin abbreviations e.g. and i.e. are commonly used in English, and nearly as commonly mixed up. If this sounds like you, i.e., you are never sure whether to use e.g. or i.e., read through this lesson to learn the difference.
The English words either and neither can cause some problems for native and non-native speakers of English. Sometimes you can use either one and sometimes you have to choose either one or the other, but neither one is very difficult.
The words fewer and less are commonly confused in English, or rather, less is used while fewer tends to fall by the wayside. You'll be less confused and make fewer mistakes after reading through this lesson.
Whether to spell any given word with ie or ei can often stump native English speakers. In school many of us were taught the mnemonic device "I before E except after C or when sounding like A as in 'neighbor' and 'weigh.' " This is a fairly good rule, but it has a lot of exceptions.